Patents by Inventor Réjean Dault

Réjean Dault has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Molten metal filtration and distribution device and method for manufacturing the same
    Patent number: 6270717
    Abstract: There is provided a filtration and distribution device for a molten metal, which is in the form of a bag having parts made of a solid heat-resistant fabric and open areas made of an open weave heat-resistant fabric. At least some of the parts made of the solid heat-resistant fabric are replaced by rigid parts made of a moldable or thermo-formable composite consisting of an open weave heat-resistant fabric embedded into a matrix made of a heat-resistant inorganic material compatible with the open weave heat-resistant fabric. Preferably, the open weave heat-resistant fabric forming the open areas of the bag, is made of yarns that are rigidified and protected by application thereto of a heat-resistant coating. This coating is preferably made of a heat-resistant inorganic material applied by spraying or dipping after the yarns are weaved. The rigidification can be achieved naturally or by thermal treatment.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: August 7, 2001
    Assignee: Les Produits Industriels de Haute Temperature Pyrotek Inc.
    Inventors: Sylvain P. Tremblay, Réjean Dault, Pierre Legast, Pierre Delvaux